Boost pressure is not the key cause of higher cylinder pressure. Flow volume, ignition timing, and cam timing are the most important. The biggest killer of engines is heat. The newer kits run more efficiently than the previous generation and therefore can make more power and maintain the same level of reliability. We are going to continue testing the durability of level 3 before it is officially released. So far things have gone well with atleast 50 dyno pulls in the last couple weeks, along with a full day of drifting.

Using a thicker headgasket would drastically reduce the efficiency of these modern engine's combustion chambers. It worked, with moderate success, on the old inline 6 engines, but does not belong on something like the S65.